Question
You grabbed a power drill that claims it can reach 2234 rpm in 0.8 s. How many revolutions does the drill make in 0.8 s?
Answers
Scott
average speed is half of top speed (from zero start)
rps = rpm / 60
(ave rps) * 0.8 s = revolutions
rps = rpm / 60
(ave rps) * 0.8 s = revolutions
Damon
acceleration = a = [ (2234-0) res/60s ] /.8s
= 46.54 revs/s^2
revs = (1/2)a t^2
= (1/2)(46.54)(.64) = 14.9 revs
= 46.54 revs/s^2
revs = (1/2)a t^2
= (1/2)(46.54)(.64) = 14.9 revs
Damon
Either way :)